I usually do the following:
-Warm up going through the major and minor scales up the whole neck.
-Then the major and minor arpeggios up the neck.
-Then I play a couple of songs along with the cd.
-Then spend the rest of the time Tabbing out songs By ear. I usually have a list of songs To tab.
-If I have a little extra time, I hum a little line, then try and play it on the bass.
Here is my cheat sheet, it covers a lot of things i practice.
http://homepage.floodcity.net/users/neo/BCS.pdf